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Header Dilemna (sp?)

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by SlyDog, Aug 24, 2001.

  1. SlyDog

    SlyDog 1/2 ton status

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    Hey all, I dont have a big budget and I want/need to get a whole new exhaust system and am strongly looking at the Hedman street headers for 100$ ... but am worried they will not make a big torque difference and I want to know what is the best way to go ? Pay the extra 200 dollars and get doug thorley headers or will the hedmans work ? I need money for the rest of the exhaust [​IMG] Can I start a donation pot? lol !

    1977 K5 Blazer [​IMG]
     
  2. Blazer79

    Blazer79 1/2 ton status

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    Thorley Headers mention in their website that their headers are designed to work with a stock exhaust. This means that if the rest of the exhaust is still good, you can save that money for the Thorleys.

    Ahem... Did I mention my 454 comes with a pair of Thorley Headers?[​IMG] rusted and ugly, but Thorleys.

    <font color=purple>//////
    <a target="_blank" href=http://blazer79.freeyellow.com>blazer79.freeyellow.com</a></font color=purple><font color=black>
    Soon a 454 K5!!</font color=black>
    [​IMG]
     
  3. Pugsley

    Pugsley 1/2 ton status

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    Thorleys are nice, but even if I could afford them, I'd probably still go with the Hedmans. Between the two, you probably would never feel the difference. If you keep the pipe diameter down (2.5" max), and slap a set of Flowmasters on, you'll still be doing good, and have 200 clams to spend on other mods.

    Dos mas Tecates!!!
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  4. SlyDog

    SlyDog 1/2 ton status

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    Thanks Pugz , thats what I needed to hear [​IMG]

    1977 K5 Blazer [​IMG]
     
  5. ChevyCaGal

    ChevyCaGal 3/4 ton status

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    Paul, you have any smog laws there? Just wondering if you will have to contend with playing that game or not?

    How can I miss you if you won't go away? [​IMG]
    <a target="_blank" href=http://www.chevycagal.homestead.com/steph.html>www.chevycagal.homestead.com/steph.html</a>
    &lt;&gt;&lt; 1 Timothy 4:12 &gt;&lt;&gt;
     
  6. wayne

    wayne 3/4 ton status

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    IMHO I think the Thorley's are over rated. On my 73 pick up I have Summit headers part # SUM-G9006 and are identical to the Headmans but only cost $79.50. The key for torque in a normal 4 into 1 header is the size of the primary tubes. For good torque run nothing bigger then a 1 5/8 inch primary tubes on a smallblock. Also 2 1/2 inch exhaust would be the max I would reccommend.

    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  7. SlyDog

    SlyDog 1/2 ton status

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    Thanks Wayne, and Steph, if there are smog laws here they arent anything compared to cali cause the guy I bought it from said I could throw a dragster engine in there and Itd be legal [​IMG]

    1977 K5 Blazer [​IMG]
     
  8. Pugsley

    Pugsley 1/2 ton status

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    Long as it's pre-1980, you can do anything you like with it in AZ. And outside of metro Phoenix or Tucson, you can desmog a 2001 and nobody cares.

    Dos mas Tecates!!!
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  9. OneLeft

    OneLeft 1/2 ton status

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    I have tried a few different headers on my 89 and now I run the Thorley's. To make a long story short, stay away from the Edelbrock headers. They are very thin and will crack. I ruined two pairs of them one summer just from doing some mild off roading. Manifolds are strong and can take abuse, headers require a little more care, add a piece of stainless braided flex pipe after the headers, this will protect your investment if you do any hard flex'n out on the trail.
     
  10. Pugsley

    Pugsley 1/2 ton status

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    The Phoenix metro emissions guidelines require testing only for those originally equipped with converters - 1980 and some 1979's are the first clean air victims.

    If the shoe fits, get another one just like it
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  11. SlyDog

    SlyDog 1/2 ton status

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    Im a 1977 so im all good ... right ?

    1977 K5 Blazer [​IMG]
    GET IT AWN
     
  12. Seventy4Blazer

    Seventy4Blazer 3/4 ton status

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    man am i glad i just moved out of cali and in to AZ...
    NO MORE SMOG.
    i plan on getting a 2001 or 2002 silverado and beefing the hell out of it. NO EMISSIONS.
    Grant

    1974 Chevy Blazer Cheyanne. but it is on 33's now, with saggy old springs. i am in Yuma Arizona if ya got any parts for me.
     
  13. Pugsley

    Pugsley 1/2 ton status

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    You're fine Paulie - 79 was the first Blazer with cats

    If the shoe fits, get another one just like it
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  14. DesertDueler

    DesertDueler 1/2 ton status

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    In you live in Phoenix, vehicles 1967 and newer have to have emissions. It sucks. Right now Im trying to get my Firebird to pass, but cant because the cam in it is too big. I hate emissions, especially since my cay is 32 years old!!

    86 Jimmy 4"lift 35"MTRs locked front.Other cars 69 Firebird w/525 hp,and 70 GTO <a target="_blank" href=http://www.geocities.com/modifierperformance>MY vehicles</a>
     
  15. Pugsley

    Pugsley 1/2 ton status

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    Light trucks should be exempt from that - When I lived in Phoenix my 77 F250 was inspection exempt, due to the fact that it had no form of smog controls from the factory. Paulie, your registration slip will tell you if you have to worry about it.

    If the shoe fits, get another one just like it
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  16. StageZ

    StageZ Registered Member

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    I'm in Cali and was wondering who makes some good headers that have fittings for AIR and a O2 sesor? Right now I have 2.5 duels, no cats, 2 chamber 40 flows, and stock exhaust manifolds... but when it's time to smog, I'm gonna throw my cats back on...
     
  17. CaptCrunch

    CaptCrunch 1/2 ton status

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    I wouldn't recommend the Headman headers. Pretty junky. If you want cheap I would go w/ the Dynomax headers. The fit and quality is pretty decent... not like a hooker header, but hey they are cheap. The last set of headmans we pput in a vehicle go so dinked and cinked it was un realy. That wasn't a Chevy truck application though.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  18. husurddy

    husurddy 1/2 ton status

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    I just put on some Thorley Tri-y's. They can come with the O2 bung and air injection if needed. The installation was real easy, and man what a change from stock exhaust.
     

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